... ( HRC)HRC50-55ApplicationBicycle, bearing, pulley, slide, handcraft, shelf, luggage, hardware, grinding mediaStandardGB/T-308-2002, GB/T1148-93Matched StandardDIN, JIS, ASMECertificationISOPackingOily ... / steel drum packing or according to customers' requirementPlace of originalShandong province, ChinaDeliveryWithin 30 days or confirmed while placing order Grinding carbon steel ball and ...